U0011 Diagnostic Trouble Code

U0011 is a kind of OBD-II Diagnostic U-Network Diagnostic Trouble Code.

It is considered generic because it applies to all makes and models of vehicles, although specific repair steps may be different depending on your car model.

Symptoms

Symptoms of a U0011 diagnostic trouble code may include:

The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Faulty PCM
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Diminished fuel efficiency

Possible Causes :

The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
Defective ECU strategies or components will prevent proper regeneration
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Look at the plug wires to make sure they are not burnt or laying on the exhaust. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. If all testing has passed so far yet you still have the same code, check your scan tool and see if it can open and close the IMRC valve.

Process Tips

Diagnostic trouble code U0011 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before U0011.

Fortunately, U0011 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U0011 Trouble Code For Specific Cars

U0011 Holden Fc Port Air Relief Circuit Malfunction
U0011 Rovin Motocar Ignition Key-In Circuit Short To Battery
U0011 Vauxhall Astra Power Window RR Motor Circuit Short To Ground
U0011 Ford Taurus Mirror Passenger Vertical Feedback Potentiometer Circuit Open
U0011 Maserati Bora Transmission Fluid Pressure Sensor/Switch C Circuit Low
U0011 Kia Sportage Sensor Power Supply Malfunction
U0011 Mercedes C 32 ABS Inlet Valve Coil LR Circuit Short To Battery